| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 59.6 | Died | Giovanni Battista Ariberti, C.O. † | Titular Archbishop of Palmyra |
| 25.1 | Ordained Priest | Henri-Joseph-Claude de Bourdeilles † | Priest | Bishop Emeritus of Soissons, France |
| 39.8 | Ordained Bishop | Johann Adam Buckel † | Titular Bishop of Corada | Auxiliary Bishop of Speyer, Germany |
| 20.7 | Professed | Florian Amand Janowski, O.S.B. † | Member of Order of Saint Benedict | Bishop of Tarnów, Poland |
| Born | Nicolas Malci † | Chsella | Bishop of Lezhë {Lesh, Alessio}, Albania |
| Born | Giovanni Battista di Mandello, O.F.M. † | Mandello | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| Died | Caietanus de Paulis † | Auxiliary Bishop of Velletri, Italy |
| 51.8 | Ordained Bishop | José Ignacio Rodríguez Cornejo † | Bishop of Palencia, Spain | Bishop of Plasencia, Spain |
| Born | Gerard Teahan (Teaghan) † | Cork | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| 15.7 | Professed | Sigismund Anton von Hohenwart, S.J. † | Member of Society of Jesus | Archbishop of Wien {Vienna}, Austria |
| Jan | 72.0 | Ordained Bishop | José de Toro y Zambrano † | Bishop of Concepción, Chile |
| 15 Jan | | Born | József Mártonfi † | Székelyszentkirály | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| 16 Jan | 49.0 | Died | Vincenzo Antonio Maria Muscettola † | Bishop of Recanati e Loreto, Italy |
| 17 Jan | 42.4 | Elevated to Cardinal | Johann Theodor von Bayern † | Cardinal, Bishop of Regensburg, Germany |
| 50.7 | Appointed | Pacificus Bizza † | Archbishop of Split (Spalato), Croatia |
| 53.4 | Appointed | Niccolò Mancinforte † | Bishop of Ancona e Numana, Italy |
| 55.0 | Appointed | Ippolito de Rossi † | Bishop of Senigallia, Italy |
| 19 Jan | 36.0 | Appointed | Nicolaus (Florentius) Szostak (a Jesu), O.C.D. † | Titular Bishop of Areopolis |
| 69.8 | Died | Antonio Maria Vantini † | Bishop of Montepulciano, Italy |
| 20 Jan | 73.2 | Resigned | Ferdinand Oesterhoff, O. Cist. † | Auxiliary Bishop of Münster, Germany | Auxiliary Bishop Emeritus |
| 23 Jan | 49.3 | Died | Francisco Zarceño Martínez, O.SS.T. † | Bishop of Solsona, Spain |
| 25 Jan | 52.5 | Died | Francesco Bernardo de Cespedes † | Bishop of Bosa, Italy |
| 28 Jan | 79.9 | Died | Francesco Maria Muscettola, C.R. † | Archbishop Emeritus of Rossano, Italy |
| 1 Feb | 48.8 | Installed | Jean-Antoine de Tinseau † | Bishop of Belley, France | Bishop of Nevers, France |
| 2 Feb | | Born | Domingo Collantes, O.P. † | Herrín de Campos, Spain | Bishop of Nueva Caceres, Philippines |
| 5 Feb | | Born | Giovanni Gaetano del Muscio † | Foggia | Archbishop of Manfredonia, Italy |
| 7 Feb | | Born | Riccardo Capece Minutolo, O.S.B. † | Napoli | Bishop of Gaeta, Italy |
| 18 Feb | 81.0 | Died | James Gordon † | Vicar Apostolic of Lowland District, Scotland, Great Britain |
| 52.1 | Succeeded | Alexander Smith † | Vicar Apostolic of Lowland District, Scotland, Great Britain |
| 20 Feb | 88.4 | Died | Nicolò Maria de’ Franchi, O.P. † | Archbishop of Genova, Italy |
| 55.7 | Died | Jan Aleksander Lipski † | Cardinal, Bishop of Kraków, Poland |
| 22 Feb | 98.0 | Died | Francisco Ignacio Añoa Busto † | Archbishop of Zaragoza, Spain |
| 28 Feb | 72.0 | Died | Joannes Bapt. Senzasoni † | Titular Bishop of Olympus (Olimpus) |
| Mar | 56.6 | Died | Bernardino Campi † | Bishop of Bobbio, Italy |
| Born | John Young † | Limerick | Bishop of Limerick, Ireland |
| 1 Mar | 37.4 | Died | Nicolaus Mauritius Fontana † | Archbishop of Oristano, Italy |
| 3 Mar | | Born | Angel Velarde y Bustamante † | Queveda, Spain | Bishop of Popayán, Colombia |
| 4 Mar | 47.8 | Selected | Jacques-Bonne Gigault de Bellefonds † | Archbishop of Paris, France |
| 5 Mar | 30.9 | Ordained Priest | Giovanni Carlo Boschi † | Priest | Cardinal, Cardinal-Priest of San Lorenzo in Lucina |
| 24.5 | Ordained Priest | Giambattista Muggiasca † | Priest | Bishop of Como, Italy |
| 24.4 | Ordained Priest | Franciscus Maria Trombini † | Priest | Bishop of Cariati e Cerenzia, Italy |
| 9 Mar | 54.5 | Appointed | Antonio Maria Arduini, O.F.M. Conv. † | Bishop of Noli, Italy |
| 44.2 | Appointed | Joseph Bruno de Bausset-Roquefort † | Bishop of Béziers, France |
| 48.5 | Appointed | Joseph-Hubert de Boccard † | Bishop of Lausanne, Switzerland |
| 59.8 | Appointed | Johann Christoph von Crass † | Auxiliary Bishop of Paderborn, Germany |
| 59.8 | Appointed | Johann Christoph von Crass † | Titular Bishop of Dibon (Dibona) | Auxiliary Bishop of Paderborn, Germany |
| 46.1 | Appointed | Angelo Longo, O.S.B. † | Bishop of Teano, Italy |
| 56.8 | Appointed | Marcus de Luchi † | Archbishop of Bar (Antivari), Montenegro |
| 57.2 | Appointed | Claude-François de Narbonne-Pelet † | Bishop of Lectoure, France |
| 47.3 | Appointed | Liborio Pisani † | Bishop of Massa Lubrense, Italy |
| 49.9 | Appointed | Innocenzo Sanseverino † | Bishop of Montemarano, Italy | Bishop Emeritus of Alife, Italy |
| 55.0 | Succeeded | Giuseppe Saporiti † | Archbishop of Genova, Italy |
| 59.0 | Appointed | Costantino Serra, C.R.S. † | Bishop of Albenga, Italy |
| 54.7 | Appointed | Seraphinus Torriani, O.F.M. † | Bishop of Pult, Albania | Bishop Emeritus |
| 40.2 | Appointed | Lazzaro Uladagni † | Bishop of Sapë, Albania | Archbishop of Bar (Antivari), Montenegro |
| 10 Mar | 71.6 | Died | Domenico Antonio Manfredi † | Bishop of Boiano, Italy |
| 12 Mar | 53.4 | Appointed | Joseph Anselme François Werbrouck † | Bishop of Antwerpen {Antwerp, Anvers}, Belgium |
| 50.3 | Selected | Andrzej Stanisław Załuski † | Bishop of Kraków, Poland |
| 13 Mar | 36.2 | Ordained Bishop | Ludovico Das Chagas, O.S.A. † | Bishop of São Tomé e Príncipe |
| 46.1 | Ordained Bishop | Angelo Longo, O.S.B. † | Bishop of Teano, Italy |
| 47.3 | Ordained Bishop | Liborio Pisani † | Bishop of Massa Lubrense, Italy |
| 50.9 | Ordained Bishop | Bernardo Rodrigues Nogueira † | Bishop of São Paulo, Brazil |
| 42.2 | Ordained Bishop | Manoel de Santa Ines Ferreira, O.C.D. † | Bishop of Angola e Congo, Angola | Archbishop of São Salvador da Bahia, Brazil |
| 49.9 | Ordained Bishop | Innocenzo Sanseverino † | Bishop of Montemarano, Italy | Bishop Emeritus of Alife, Italy |
| 54.2 | Ordained Bishop | Francisco de São Tiago, O.F.M. † | Bishop of São Luís do Maranhão, Brazil |
| 90.3 | Died | Charles-Gaspard-Guillaume de Vintimille du Luc † | Archbishop of Paris, France |
| 14 Mar | | Born | Rafael de Castello de Vide, O.F.M. † | Castello de Vide, Portugal | Bishop of São Tomé e Príncipe |
| 19 Mar | | Born | Mauro Paolo Giuseppe Antonino Michele Maria Mari, O.S.B. † | Cardano, Italy | Bishop Emeritus of Dora |
| 20 Mar | 71.7 | Died | Francesco Antonio Bussolini, O.S.B. † | Bishop of Penne e Atri, Italy |
| 54.8 | Ordained Bishop | Seraphinus Torriani, O.F.M. † | Bishop of Pult, Albania | Bishop Emeritus |
| 21 Mar | | Born | Caesar Muni-Forno † | Palermo | Auxiliary Bishop of Messina, Italy |
| 24 Mar | 59.5 | Died | Joseph Franz Valerian Felix von Arco † | Bishop-Elect of Chiemsee, Germany |
| 25 Mar | 77.9 | Died | Francesco Martinengo † | Auxiliary Bishop of Brescia, Italy |
| 26 Mar | 24.5 | Ordained Priest | Pietro Ruggieri † | Priest | Bishop of Ruvo (Ruo)(di Puglia), Italy |
| 24.3 | Ordained Priest | Emanuele de Tomasiis † | Priest | Bishop of Ascoli Satriano, Italy |
| 28 Mar | 40.2 | Appointed | Miguel de Bulhões e Souza, O.P. † | Bishop of Malacca, Singapore | Bishop of Leiria, Portugal |
| 61.6 | Appointed | Giovanni Battista Campagnoli † | Bishop of Recanati e Loreto, Italy |
| 30.4 | Appointed | João Cosme da Cunha (de Nossa Senhora da Porta), O.C.S.A. † | Coadjutor Bishop of Leiria, Portugal | Cardinal, Archbishop of Évora, Portugal |
| 30.4 | Appointed | João Cosme da Cunha (de Nossa Senhora da Porta), O.C.S.A. † | Titular Bishop of Olympus (Olimpus) | Cardinal, Archbishop of Évora, Portugal |
| 47.6 | Appointed | Jean Antoine de Robiano † | Bishop of Roermond, Netherlands |
| 48.2 | Confirmed | Ferdinand Julius von Troyer † | Cardinal, Bishop of Olomouc (Olmütz), Czech Republic |
| 29 Mar | 75.5 | Died | Christophe-Louis Turpin de Crissé de Sanzay † | Bishop of Nantes, France |
| 30 Mar | 23.8 | Ordained Priest | Joannes Lucas Garagnin † | Priest | Archbishop of Split (Spalato), Croatia |
| 5 Apr | 84.8 | Died | Álvaro de Abranches e Noronha † | Bishop of Leiria, Portugal |
| Born | Bernardo Nadal Crespí † | Soller | Bishop of Mallorca, Spain |
| 8 Apr | 30.5 | Succeeded | João Cosme da Cunha (de Nossa Senhora da Porta), O.C.S.A. † | Bishop of Leiria, Portugal | Cardinal, Archbishop of Évora, Portugal |
| 9 Apr | 43.3 | Ordained Priest | Francesco Ferrante † | Priest | Bishop of Andria, Italy |
| 12 Apr | 54.6 | Ordained Bishop | Antonio Maria Arduini, O.F.M. Conv. † | Bishop of Noli, Italy |
| 61.6 | Ordained Bishop | Giovanni Battista Campagnoli † | Bishop of Recanati e Loreto, Italy |
| 15 Apr | 54.3 | Died | Paolo Cernuschi † | Bishop of Como, Italy |
| 17 Apr | 39.5 | Selected | Jean-Joseph Chapelle de Saint-Jean de Jumilhac † | Archbishop of Arles, France |
| 50.6 | Appointed | Francesco Viviani † | Bishop of Camerino, Italy |
| 50.6 | Appointed | Francesco Viviani † | Bishop of Fabriano, Italy | Bishop of Camerino, Italy |
| 18 Apr | 46.9 | Appointed | Georgius Wolfgangus Chiolich † | Bishop of Senj (-Modruš), Croatia |
| 53.4 | Installed | Camillo Paolucci (Merlini) † | Cardinal-Priest of Santi Giovanni e Paolo | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 20 Apr | | Born | Louis-Mathias-Joseph de Barral † | Grenoble | Archbishop Emeritus of Tours, France |
| 24 Apr | 65.3 | Appointed | Johann Christian Adam von Königsfeld † | Titular Bishop of Erythrae |
| 27 Apr | 42.6 | Appointed | Johann Theodor von Bayern † | Cardinal-Priest of San Lorenzo in Panisperna | Cardinal, Bishop of Regensburg, Germany |
| 1 May | 44.3 | Ordained Bishop | Joseph Bruno de Bausset-Roquefort † | Bishop of Béziers, France |
| 48.7 | Ordained Bishop | Joseph-Hubert de Boccard † | Bishop of Lausanne, Switzerland |
| 35.3 | Ordained Bishop | Louis-Marie Deveaux, M.E.P. † | Titular Bishop of Lerus | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 44.7 | Selected | Franz Karl Eusebius von Waldburg-Friedberg und Trauchburg † | Bishop of Chiemsee, Germany |
| 2 May | 52.7 | Appointed | Bernardo Cangiani † | Bishop of Boiano, Italy | Bishop Emeritus |
| 48.0 | Confirmed | Jacques-Bonne Gigault de Bellefonds † | Archbishop of Paris, France |
| 38.0 | Appointed | Innocenzo Gorgoni, O.S.B. † | Bishop of Penne e Atri, Italy | President Emeritus of Pontifical Ecclesiastical Academy, Roman Curia |
| 52.3 | Appointed | Charles-Guy Le Borgne de Kermorvan † | Bishop of Tréguier, France |
| 53.9 | Appointed | Giacinto Silvestri † | Bishop of Nepi e Sutri, Italy | Bishop of Orvieto, Italy |
| 50.4 | Confirmed | Andrzej Stanisław Załuski † | Bishop of Kraków, Poland |
| 5 May | 78.3 | Died | Edme Mongin † | Bishop of Bazas, France |
| 7 May | 59.3 | Resigned | Francesco Antonio Razzolini, O.F.M. Conv. † | Bishop of Santorini {Thira}, Greece | Bishop Emeritus |
| 8 May | 52.7 | Ordained Bishop | Bernardo Cangiani † | Bishop of Boiano, Italy | Bishop Emeritus |
| 38.1 | Ordained Bishop | Innocenzo Gorgoni, O.S.B. † | Bishop of Penne e Atri, Italy | President Emeritus of Pontifical Ecclesiastical Academy, Roman Curia |
| 53.9 | Ordained Bishop | Giacinto Silvestri † | Bishop of Nepi e Sutri, Italy | Bishop of Orvieto, Italy |
| 10 May | 64.3 | Died | Charles-François des Moustiers de Mérinville † | Bishop of Chartres, France |
| 13 May | 74.2 | Died | François-César Le Blanc † | Bishop of Avranches, France |
| 18 May | 70.6 | Died | Lodovico Maria Pandolfini † | Bishop of Volterra, Italy |
| 19 May | | Born | Francesco Amoroso † | Muocenesi | Archbishop of Lanciano, Italy |
| 57.4 | Ordained Bishop | Claude-François de Narbonne-Pelet † | Bishop of Lectoure, France |
| 22 May | 60.0 | Ordained Bishop | Johann Christoph von Crass † | Titular Bishop of Dibon (Dibona) | Auxiliary Bishop of Paderborn, Germany |
| 48.3 | Ordained Bishop | Ferdinand Julius von Troyer † | Cardinal, Bishop of Olomouc (Olmütz), Czech Republic |
| 25 May | 68.8 | Died | Pier Gerolamo Caravadossi, O.P. † | Bishop of Casale Monferrato, Italy |
| 26 May | | Born | José António Pinto de Mendonça Arrais † | Seia | Bishop of Guarda, Portugal |
| Jun | | Born | Girolamo Luigi Crivelli † | Tridentin | Bishop of Nepi e Sutri, Italy |
| 1 Jun | | Born | Louis-François-Alexandre de Jarente de Senas d’Orgeval † | Soissons | Bishop Emeritus of Orléans, France |
| 4 Jun | 23.2 | Ordained Priest | Johann Georg Joseph von Eckart † | Priest of Mainz, Germany | Auxiliary Bishop |
| 32.3 | Ordained Priest | Pietro Paolo Leonardi † | Priest | Bishop of Ascoli Piceno, Italy |
| 6 Jun | | Born | Hilarion-François de Chevigné de Boischollet † | Herbergement | Bishop of Sées, France |
| 7 Jun | | Born | Antonio Carrillo Mayoral † | Palencia | Bishop of Plasencia, Spain |
| 9 Jun | | Born | Salvatore Spinelli, O.S.B. † | Napoli | Archbishop of Salerno, Italy |
| 11 Jun | | Born | Elléon de Castellane-Mazangues † | Provence | Bishop of Toulon, France |
| 12 Jun | 47.8 | Ordained Bishop | Jean Antoine de Robiano † | Bishop of Roermond, Netherlands |
| 13 Jun | 47.8 | Installed | Jean Antoine de Robiano † | Bishop of Roermond, Netherlands |
| 14 Jun | 66.5 | Appointed | Salvador Bermúdez y Becerra † | Archbishop of La Plata o Charcas, Bolivia |
| 46.9 | Appointed | Gaspare Lancellotti-Birago † | Bishop of Bobbio, Italy |
| 52.6 | Appointed | Joannes Calebotta † | Bishop of Arbe (Rab), Croatia | Bishop of Šibenik (Knin), Croatia |
| 56.3 | Appointed | Agostino Maria Neuroni, O.F.M. Cap. † | Bishop of Como, Italy |
| 47.1 | Appointed | José de Peralta Barrionuevo y Rocha Benavídez, O.P. † | Bishop of La Paz, Bolivia |
| 71.7 | Appointed | Agustín Rodríguez Delgado † | Archbishop of Lima, Peru |
| 35.8 | Appointed | Giuseppe de Vignoli † | Bishop of San Severino (Marche), Italy | Bishop of Forli, Italy |
| 15 Jun | 60.1 | Installed | José Francisco de San Buenaventura Martínez de Tejada y Díez de Velasco, O.F.M. † | Bishop of Yucatán (Mérida), México | Bishop of Guadalajara, Jalisco, México |
| 17 Jun | | Born | Filippo Speranza † | Laurito | Bishop of Capaccio, Italy |
| 19 Jun | 46.9 | Ordained Bishop | Gaspare Lancellotti-Birago † | Bishop of Bobbio, Italy |
| 24.7 | Ordained Priest | Antônio Corrêa, O.S.A. † | Priest of Order of St. Augustine | Archbishop of São Salvador da Bahia, Brazil |
| 56.3 | Ordained Bishop | Agostino Maria Neuroni, O.F.M. Cap. † | Bishop of Como, Italy |
| 35.8 | Ordained Bishop | Giuseppe de Vignoli † | Bishop of San Severino (Marche), Italy | Bishop of Forli, Italy |
| 25 Jun | 29.1 | Appointed | Pierre-Augustin-Bernardin de Rosset de Rocozel de Fleury † | Bishop of Chartres, France |
| 26 Jun | 52.6 | Ordained Bishop | Joannes Calebotta † | Bishop of Arbe (Rab), Croatia | Bishop of Šibenik (Knin), Croatia |
| 41.7 | Ordained Priest | Franz Heinrich Wendelin von Kageneck † | Priest of Eichstätt, Germany | Auxiliary Bishop Emeritus |
| 28 Jun | | Born | Jean-Siffrein Maury † | Valreás, France | Cardinal, Bishop Emeritus of Corneto (Tarquinia) e Montefiascone, Italy |
| 29 Jun | 40.5 | Ordained Bishop | Miguel de Bulhões e Souza, O.P. † | Bishop of Malacca, Singapore | Bishop of Leiria, Portugal |
| 30.7 | Ordained Bishop | João Cosme da Cunha (de Nossa Senhora da Porta), O.C.S.A. † | Bishop of Leiria, Portugal | Cardinal, Archbishop of Évora, Portugal |